Zircon SHRIMP age of Mesoarchaean meta-argilloarenaceous rock in the Anshan area and its geological significance  

作　　者：万渝生 宋彪 刘敦一 

机构地区：[1]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China [2]Open Research Laboratory on Isotope Geology, Ministry of Land and Resources, Beijing 100037 China

出　　处：《Science China Chemistry》2002年第z1期121-129,共9页中国科学（化学英文版）

基　　金：the Basic Research Grant from the Ministry of Land and Resources of the People's Republic of China (Grant Nos. DKD2001020-3, 20010209 , DKD9904011); the National Natural Science Foundation of China (Grant No. 49473172).

摘　　要：In order to better understand the early continental evolution of the Anshan area, one of the typical Precambrian distribution areas of the North China Craton, the geochronology and REE composition of the zircons from the meta-argillo-arenaceous rock occurred as enclave in 3.1 Ga Lishan trondhjemite are studied by using SHRIMP ll ion microprobe. It is indicated that the Pa- leoarchaean is a very important continental formation period in the Anshan area and 3.2 Ga can be regarded as the boundary between the Paleoarchaean and Mesoarchaean.In order to better understand the early continental evolution of the Anshan area, one of the typical Precambrian distribution areas of the North China Craton, the geochronology and REE composition of the zircons from the meta-argillo-arenaceous rock occurred as enclave in 3.1 Ga Lishan trondhjemite are studied by using SHRIMP II ion microprobe. It is indicated that the Paleoarchaean is a very important continental formation period in the Anshan area and 3.2 Ga can be regarded as the boundary between the Paleoarchaean and Mesoarchaean.

关 键 词：SHRIMP  zircon  geochronology  REE composition of zircon  Archaean  argillo-arenaceous rock  Anshan. 

分 类 号：P588.212.3[天文地球—岩石学]